登录之后可查看解析

Answer (A) is correct . The word beta is derived from the regression equation for regressing the return of an individual security (the dependent variable) to the overall market return. The beta coefficient is the slope of the regression line. The beta for a security may also be calculated by dividing the covariance of the return on the market and the return on the security by the variance of the return on the market.

Answer (B) is incorrect because Beta equals the covariance of the returns on the market and on the security divided by the variance of the return on the market.
Answer (C) is incorrect because Beta equals the covariance of the returns on the market and on the security divided by the variance of the return on the market.
Answer (D) is incorrect because Beta equals the covariance of the returns on the market and on the security divided by the variance of the return on the market.